Consider the following statements 1 Other than those made by humans nanoparticles do not exist in na...........

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Consider the following statements:

1.Other than those made by humans,nanoparticles do not exist in nature.

2.Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.

3.Nanoparticles of some commercial products which enter the environment are unsafe for humans.

How many of the statements given above is/are correct?

Only one

Only Two

Only Three

All Four

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Explanation:

Incorrect. Nanoparticles do exist in nature; for example, volcanic eruptions and forest fires can produce nanoparticles.

Correct. Titanium dioxide and zinc oxide nanoparticles are examples of metallic oxide nanoparticles commonly used in sunscreens and other cosmetics.

Correct. Some nanoparticles can have adverse effects on human health and the environment. Their small size allows them to easily enter biological systems, which can be harmful.

So, the correct answer is: Only Two